Add Security Service to In Use Share Networks

Manila supports different types of security services such as LDAP, Kerberos and Microsoft Active Directory. Users are able to create, update, view and delete security services, however, in order to apply its configuration, manila needs to maintain an association between security services and share networks. Although, there is no way of providing such association after a share network is being used by any share server.
This blueprint aims to improve this association by letting users to associate security services from in use share networks, providing a new mechanism for update share servers that were already instantiated in their storage systems.